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Group 17, period 2
refer to a periodic able and find out which element your are looking for and see what period is it in (horizontally)
Helium is a period 1 element.
It shows the horizonal row of the element so like Ex: Rb which is period 5 cause u count how many rows there is and when u find the element(He) it is in the 5th row
He is in period 1.
That is not true. The first element in a period may be active or inactive, depending on the specific electron configuration of the element. For example, the first element in period 1, hydrogen, is not considered an active element.
The element in period 4 of the Periodic Table with the highest electronegativity is krypton (2.96). The period 4 element with the lowest electronegativity is potassium (0.82).
The element neon is in period 2. Classified as a non-metal. :)
You can determine the number of energy levels an element possesses by looking at its period number on the periodic table. Each period corresponds to a different energy level, so the period number indicates how many energy levels the element has.
On the Periodic Table, a Period is one of the horizontal rows. If an element is last in it's period, then it's on the right hand side of the Periodic Table. There is an inert gas at the end of every Period.
Carbon is in period 2. To find the period number, you can look at the row in which the element is located on the periodic table. Carbon is in the second row of the periodic table, so it is in period 2.
its the 4th period